Why wouldn't HCl(aq) be a good acid to use to determine the solubility of silver precipitates in acid solution

Answer

Hcl dissociates into H+ and Cl-. The reason is explained below

Explanation:

Hydrogen Chloride would not be a good acid to use because of this following chemical reaction:

Ag+(aq) + Cl-(aq) ---> AgCl (s).

From this reaction above we see that dissolved silver ions are capable of reacting with Cl- from hydrogen chloride to form silver chloride AgCl and it precipitates from solution

If you attempt to dissolve a precipitate that has silver and HCl, the first/initial precipitate is going to be converted to another precipitate and no silver will enter the solution.